3. Versatility Wafer head reamer self-drilling screws can be used in various materials, including sheet metal, wood, and composite materials. Their adaptability makes them suitable for multiple industries, from construction to automotive manufacturing.

Metal expansion nuts, often referred to as expansion anchors or expansion inserts, are specialized fasteners that expand when a bolt or screw is threaded into them. They typically consist of a cylindrical body with slits along its length or an expandable design that facilitates outward expansion. The main purpose of these nuts is to create a secure grip within a substrate, such as concrete, wood, or metal, thereby preventing loosening due to vibrational forces, temperature fluctuations, or stress.

2. Chemical Resistance EPDM exhibits remarkable resistance to a wide range of chemicals, including acids, alkalis, and alcohols. This makes EPDM washered fasteners suitable for use in environments where they may be exposed to harsh substances, such as in the automotive or chemical processing industries.